shedd aquarium: I need to get to Springdale, which is right in the entrance to Zion National Park. There is no public transportation to Springdale - what are my options to get there, then? Is there a shuttle from St. George or some kind of other service to Springdale? Can I do a one-way car rent and return the car in Springdale (I don't think there are rental agencies there)? I know there are guided tours that come out of Las Vegas - but I don't want the guided tour and I also need some way to get back from the park... Anybody has any suggestions? Thanks very much in advance.|||If I were you, I would call Zion Canyon Visitors Bureau, which locates in Springdale. Their phone # is 1-888-518-7070. Good luck!